alternate ntp: fix website page jankiness when suggestions show and top bars are hidden

chrome/browser/ui/views/frame/contents_container.h

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_FRAME_CONTENTS_CONTAINER_H_
 #define CHROME_BROWSER_UI_VIEWS_FRAME_CONTENTS_CONTAINER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 38 matching lines @@
                   bool draw_drop_shadow);
 
   // When the active content is reset and we have a visible preview,
   // the preview must be stacked back at top.
   void MaybeStackPreviewAtTop();
 
   content::WebContents* preview_web_contents() const {
     return preview_web_contents_;
   }
 
+  int preview_height() const;

[dhollowa, 2013/01/25 21:24:08]

nit: since this is snake case (trivial) better to inline the implementation here
in the header?

[Peter Kasting, 2013/01/28 21:51:00]

Anything named unix_hacker()-style should be inlined.  Anything not inlined
should be named in CamelCase.

[kuan, 2013/01/29 00:17:08]

Done.

[kuan, 2013/01/29 00:17:08]

Done.

+
   // Sets the active top margin.
   void SetActiveTopMargin(int margin);
 
   // Returns the bounds the preview would be shown at.
   gfx::Rect GetPreviewBounds() const;
 
   // Returns true if preview occupies full height of content page.
   bool IsPreviewFullHeight(int preview_height,
                            InstantSizeUnits preview_height_units) const;
 
@@ skipping 20 matching lines @@
   int active_top_margin_;
 
   // The desired height of the preview and units.
   int preview_height_;
   InstantSizeUnits preview_height_units_;
 
   DISALLOW_COPY_AND_ASSIGN(ContentsContainer);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_FRAME_CONTENTS_CONTAINER_H_